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Step 3.7 Flash vs GPT 6 Astra

At a glance

StepFun's efficient multimodal MoE model for high-throughput analysis and agents.

256K ctx$0.20/$1.15 per M

OpenAI's new flagship for demanding end-to-end work: advanced analysis, software engineering, deep research, scientific work, and document creation.

1.1M ctx$10.00/$50.00 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper98%
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Specs
256K
Context
128K
Max output
May 2026
Released
1.1M
Context
128K
Max output
Sep 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input98%$0.20/M tokens
Output98%$1.15/M tokens
Cache read96%$0.04/M tokens
Live pricing, shown before you run
Input$10.00/M tokens
Output$50.00/M tokens
Cache read$1.00/M tokens
Cache write$12.50/M tokens
Web search$0.01/search
Chat with Step 3.7 FlashGo to model
Chat with GPT 6 AstraGo to model
Frequently Asked Questions: Step 3.7 Flash vs GPT 6 Astra▼

Which is better, Step 3.7 Flash or GPT 6 Astra?

▼

Both Step 3.7 Flash and GPT 6 Astra are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, Step 3.7 Flash or GPT 6 Astra?

▼

Step 3.7 Flash has a lower blended cost. Step 3.7 Flash: $0.20 input / $1.15 output. GPT 6 Astra: $10.00 input / $50.00 output.

Which has a larger context window, Step 3.7 Flash or GPT 6 Astra?

▼

GPT 6 Astra has a larger context window: Step 3.7 Flash supports 256K tokens vs GPT 6 Astra at 1.1M tokens.

Do both Step 3.7 Flash and GPT 6 Astra support vision?

▼

Yes, both Step 3.7 Flash and GPT 6 Astra support vision/image input.

What are the key differences between Step 3.7 Flash and GPT 6 Astra?

▼

Key differences: Step 3.7 Flash is significantly cheaper. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Step 3.7 Flash and GPT 6 Astra for free on idapt.app to see which performs better for your specific needs.

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